Abstract: The invention concerns a roll-coating machine for the application of coating colors onto a paper web, including:a coating roll that rotates in a coating color pool;a trough retaining the color pool and having a coating color inlet, a guide wall with a first overflow edge, and an overflow channel for a first overflow stream;a mating roll that rotates in a direction opposite to that of the coating roll and with it forms an inlet gusset and an outlet gusset; anda guide shield that has a second overflow edge on its downstream end for a second overflow stream, a bypass channel for division of the second overflow stream and having a valve, and a restrictor defined by the guide shield in cooperation with the paper web.

Abstract: A method of digesting waste paper is disclosed wherein waste paper is digested in a gas-tight container at an elevated pressure supplied by compressed gas introduced to the container. The digestion mixture is circulated within the pulper by a rotor having vanes or helical surfaces.

Abstract: The invention concerns the recycling of waste paper in a deinking process with flotation with at least one other cleaning stage downstream. According to the invention, selective flotation is performed in multiple stages. After no more than a third flotation stage, the flotation foam collected up to that point is removed and purified by means of flash flotation, which produces sludge, clear water and separated foam that contains the contaminants from the waste paper feed. Subsequently, the sludge is removed from the paper recycling process. Large impurities are removed from the sludge (foam) (except for the foam from up to the three last stages) in up to two washing units (including thickeners) or screen units. The fibers are then separated from the relatively fine contaminants, and these contaminants are primarily removed as sludge from the resulting low-fiber fractions by flash flotation.

Abstract: A device for feeding the leader of a paper web from below to a rolling machine roll, with a number of guide plates which direct the web leader upward and which, viewed in the web running direction, are arranged increasingly more steeply and eventually vertically, additionally with blowing organs that feature each a hollow body arranged transverse to the web running direction and a number of nozzles arranged in the web running direction, and which, viewed in web running direction, are arranged each between two overlapping guide plates. The invention is characterized in that at least the blowing organ which, in the web running direction, precedes the first vertical plate features turbulence-generating nozzles.

Abstract: The invention relates to a sickleless internal gear pump with an internal ring gear and a pinion meshing with the ring gear. The ring gear and pinion are rotatably mounted in a common housing part having an axial expanse corresponding to the width of the teeth of the ring gear and the pinion. The housing features a suction port and a pressure port. The ring gear features radial ports for the fluid medium to be pumped. Disposed in the pressure side region of the housing, opposite the rotating gearing parts of the ring gear and the pinion, is an axially movable axial disk exerting a force on the rotating gearing parts dependent on an axial pressure derived from the working pressure. The axially movable disk provides axial sealing by compensating for the gap between it and the fixed housing.

Abstract: In a paper making machine a porous support belt travels together with the web over a drying cylinder and leaves the cylinder at a point of removal. A suction box provided in the region of the web removal has a suction zone which is defined by means of two yieldable sealing strips which extend transversely to the direction of travel of the web, and each is supported in a sealing strip holder. The distance between each sealing strip holder and the outer surface of the drying cylinder amounts to at least 30 mm, and each of the yieldable sealing strips has, in its normal condition of operation, such an inherent stiffness that the sealing strip remains substantially free of deformation in the event of a difference in pressure of 0.01 to 0.1 bar between the suction zone and its surroundings.

Abstract: A roll, especially for press rolls in paper machines includes an elastomeric shell separated from a roll core. The roll is characterized by the fact that, in the region of the axial end of the roll core, there is a large reduction in thickness of the roll shell, with the reduced thickness provided substantially at the axial end of the roll shell or in an annular transition region spaced from and near the end of the shell.

Abstract: In a process for the coating of a running web of paper or cardboard, provisions are that in a press gap formed between two rolls a coating substance applied in a very small quantity on the surface of the one roll is first pressed on the web leaving a very thin coat on the web which, however, covers all spots including the "mounds" of microroughness. Next, the second coat can be applied and dosed on the still moist first coat with the usual means. In the process, the first coat is preferably dosed on the shell of the first roll, by means of the peripheral grooves of a rotary doctor. The same may be performed also as regards the second coating on the web.

Abstract: The invention relates to a sag-compensation roll having a roll shell (1), a stationary yoke (2), and an oblong hydrostatic pressure shoe (8) which can be tilted about a longitudinal axis and contains hydrostatic pressure pockets (11, 12). The pressure shoe is fitted to the inside diameter of the roll shell (1) and is attached to a radially movable oblong piston (4) which is sealed off from the yoke (2). The longitudinal ridges (9, 10) which define the individual hydrostatic pockets (11, 12) have a width (a, b) equal to at most 1/20 of the width (K) of the piston. The pressure shoe (8) is hydraulically supported over the main part of its width on its lower side, i.e. the side which faces the yoke (2).

Abstract: A winder for winding a running paper web is provided that includes a first and a second support roller that together form a winding bed to hold a paper roll with the paper web wound around the first support roller. The winding bed consists of the first and the second support rollers. The first and the second support rollers are fixed into position with the second support roller being positioned lower than the first support roller so that a plane through the axes of the first and the second support rollers forms an angle with a horizontal plane. The first and the second support rollers each having a liner. The liner of the second support roller is considerably more deformable than the liner of the first support roller.

Abstract: The invention concerns a process for the treatment of wastepaper, carried out for the most at a high consistency of at least 13% in the first stages, beginning the dissolution (soaking) and including a coarse sorting stage. The invention is characterized in that in the case of wastepaper containing a share of at least 40% of deinking wastepaper provided with printing inks the three first process stages, namely in this order of soaking, coarse cleaning and the further extensive dissolution of the wastepaper, take place at a considerable reduction of the wastepaper shreds to the usual speck size at a consistency of at least 13%, and the soaking under considerable addition of dissolving chemicals, and that the wastepaper including essentially all heavy contaminations, such as part of wood, glass, plastic or metal contained in the wastepaper, including pieces of metal straps of the wastepaper bales, is fed to the process.

Abstract: The invention relates to a stuffing box seal to provide a sealing action between a stationary wall of a housing or the like and a shaft. In accordance with the invention the shaft is provided with a collar, or with a ring or ring flange, which is sealingly connected with the shaft and is such a manner as to prevent relative twist, having an annular surface perpendicular to the axis of rotation of the shaft, against which ring surface box packing bears with a sealing action in the direction parallel to the shaft axis.

Abstract: A hydraulic support device in a paper making machine for supporting a first beam (52) on a second beam (53), having a pressure cushion (54) between the two beams. The pressure prevailing in the pressure cushion is variable but it is uniform over the entire length of the pressure cushion. The pressure cushion (54) rests on a contact surface of the first beam (52). The width (b) of the contact surface as seen in cross section is less than the total width (B) of the pressure cushion (54). A free space (55) into which a loop of the pressure cushion (54) can penetrate is provided on each side of the contact surface.

Abstract: A device for applying coating composition to a fiber web has at least one application roll for receiving a film of coating color at a feed location and for then delivering it to the fiber web at a delivery location. A nozzle applicator feeds coating color to a nozzle at the feed position of application roll. The nozzle has a downstream lip with a metering doctor on it for metering the thickness of the coating color applied to the roll. The nozzle has an upstream lip in the form of an overflow ledge spaced from the surface of the application roll. Coating liquid overflows the overflow ledge and is collected in a first overflow trough. To clean the outer surface of the application roll before coating color is thereto applied, a scraper blade scrapes the surface of the roll. Upstream in the rotation path from the scraper blade is a sprayer for spraying liquid on the application roll so that the scraper scrapes the surface of the application roll with liquid on it.

Abstract: The dry end of a paper machine comprises a first dryer group with top drying cylinders (11 to 14), with a first drying wire (10) and with bottom deflection suction rolls (21 to 23). Adjacent this, there is a second dryer group with bottom drying cylinders (15 to 18), with a second drying screen (20) and with top deflection suction rolls (25 to 27). In this way, both sides of the web (9) to be dried come, in succession, into direct contact with the drying cylinders. At the place where the web (9) changes from the first drying wire to the second drying wire, there is a transfer suction roll (24) which lies within the loop (20) of the second support belt. The web (9) travels there from the last cylinder (14) of the first dryer group over an at least approximately straight travel path to the transfer suction roll (24) and thus onto the second support belt (20).

Abstract: A dryer section of a machine for manufacturing fiber webs, which includes a plurality of heatable drying cylinders arranged to form at least a first dryer group and a second dryer group, and arranged in horizontal cylinder rows, and including a plurality of suction rolls each being disposed between two adjacent cylinders. The cylinders of the first group have axes disposed in a first plane I, the suction rolls of the first group have axes disposed in a second plane II, the cylinders of the second group have axes disposed in a third plane III, and the suction rolls of the second group have axes disposed in a fourth plane IV. In accordance with different embodiments planes I and II may be coplanar, planes II and III may be coplanar; planes I and III may be disposed between planes II and IV; and the axes of the first drying cylinders and its associated suction roll of the second group may be disposed below the axes of the other drying cylinders and suction rolls of the second group.

Abstract: An elastic clutch of disk design is used with a divided flywheel for an internal combustion engine having two clutch halves which are rotatable relative to each other and include several cutouts about their circumference. Helical springs are disposed in a parallel and nested manner and upon mutual rotation of the two clutch halves are operable essentially simultaneously. The elastic clutch elements include a main spring and at least two partial springs which are arranged within the main spring. A one-part or multiple-part guide component disposed between the partial springs centers the partial springs and supports them in relation to the main spring.

Abstract: A screening apparatus is disclosed having at least one housing attachment element and a main housing element, each of which has a hollow cylindrical and/or truncated-cone-shaped housing outer wall. The apparatus includes at least two coaxial, predominantly rotationally symmetrical screen baskets and a rotor having pulsation elements. An accepts chamber is disposed radially outside the screen baskets and the rotor and pulsation elements are disposed radially inside the screen baskets. An inlet of the housing is disposed centrally in the area between the screen baskets and an outlet channel allowing for access in the area between the two screen baskets. The invention is characterized in that at least in the area of the screen baskets, only one main housing element and one attachment element are provided and that the first screen basket is disposed in the attachment element and the second screen basket is disposed in the main housing element.

Abstract: A coating blade adjustment system with a blade which on its one end is retained in a mounting and supported between this mounting and its working edge by one or several support elements. Between the support edge of the support element(s), in the area within or on the support elements, there is at least one measuring sensor provided for measuring the spacing of the blade from the measuring sensor for a precision adjustment.

Abstract: The invention concerns a mixing system for mixing two liquids at the inlet to the headbox of a paper machine with: an inlet line (A) for the first partial volume flow (a); an inlet line (B) for the second partial volume flow (b); an outlet line (C) for the mixture volume flow (c) with the flow resistance (W); a mixing angle (.alpha.) with the inlet line (A) and the inlet line (B); a main flow angle (.beta.) between the inlet line (A) and outlet line (C); a valve (S) installed in the inlet line (B) for control of the partial volume flow (b). The mixing angle (.alpha.) is selected so that the mixture volume flow (c) remains constant, independent of the partial volume flow (b).